feat: add basic book layout

src/_layouts/catalogue.html

@@ -6,7 +6,7 @@ layout: base
     <section class="[ meta ] [ flex justify-between mb-1 ]">
         <div>
             <h1>{{ title }}</h1>
-            <h2>{{ subtitle }}</h2>
+            <h2 class="[ text-fadeText ]">{{ subtitle }}</h2>
         </div>
         {% if image %}
             <div>{% image image, "", "" %}</div>